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Introduzione

The FitBit One is part of the family of fitness devices from FitBit Inc, designed to track your movement throughout the day and display the data via a website dashboard.

FitBit One is a wearable device that keeps track of the number and rate of steps you take and stairs you climb, and it uses this information to calculate various metrics like distance covered and calories burned. The device periodically sends the data it gathers to FitBit's servers via wireless communication with internet connected smartphones, iPads, or a PC with dongle.

There are a number of interesting features that warrant the teardown. It has a rechargeable battery that should power the device for about two weeks. It has a haptic alarm for time of day reminders. It has a bright LED display that shows the current statistics, and it is claimed to be sweat proof and rain proof, but not water proof. it also claims to remember minute-by-minute movement stats for up to seven days, and a summary of movement data for much longer.

My Fitbit went through the clothes washer attached to my jeans. When it came out I was amazed it was still working, but after 2 days the display went blank, and it was dead to the world. I tried unsuccesfully to dry it out in rice for a week, but that didn't help at all. I then took the decision to carefully open it as in this guide. I found quite a lot of sulphate corrosion at various places on the board, plus some water droplets inside the case. I cleaned the board with an ear bud dipped in methylated spirits to remove the corrosion, and I dried the water drops carefully with hair dryer. After gluing it together, and charging, it is working perfectly again - I guess not as water tight as before, but I can live with that - so long as it doesn't go through the washer again :P

My Fitbit One fell face down during a wintry mix and drizzle and when I found it, it wasn't working. I put it in a bag of rice for a few hours but it didn't work. I opened it up and everything was remarkably clean and dry, but so far no success in resuscitation!

@Elias, I used a heavy duty razor blade utility knife slipped under the end by the switch, and twisted gently to not damage the finish along the edge. Patience to wait while the glue stretches and releases is key. The same knife along one side of the case was enough to open that as well.

Unfortunately in my washing machine induced case, the corrosion in the battery charging circuit appears to be fatal.